P: Set Time Zone Offset command is not documented

The command Map > Tracklog > Set Time Zone Offset is not documented:  https://helpx.adobe.com/lightroom/help/maps-module.html#work_with_photos_and_gps_data. I tediously watched the LR 4 tutorial on that page (10 minutes!), and while the tutorial mentions correcting local times in the Library module, it doesn't mention the Set Time Zone Offset command.